Justin Bieber suffers concussion during Paris concert

Justin Bieber has millions of fans, but he may also have one mortal enemy - glass.

For the second time in his young career the pop idol walked into a glass wall, this time during a concert in Paris. It was in between songs that Bieber, while back stage, bumped his noggin pretty bad and ended up with a concussion.

"It really hurt," Bieber
tells TMZ. He explains that he went back to do one last song for the fans, but that's when things got worse. "After that I went off stage and immediately felt really weak...I passed out for like 15 seconds and I was unresponsive."

A few years ago, Bieber had a run in with a revolving door. In that case the door won.